Finding the Fourth Proportional to 1,677.87, 2,315.43 and 931.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.87 : 2,315.43 = 931.82 : x
2. Step 2: Convert to fraction form
   1,677.87/2,315.43 = 931.82/x
3. Step 3: Cross multiply
   1,677.87x = 2,315.43 × 931.82
4. Step 4: Simplify right side
   1,677.87x = 2,157,552.41
5. Step 5: Solve for x
   x = 2,157,552.41/1,677.87
6. Step 6: Final answer
   x = 1,285.89